Nortel Networks Circuit Card - Manual (Page 774)

Page 774 of 906 NTBK50 2.0 Mb PRI card
553-3001-211 Standard 3.00 August 2005
You can install this card in slots 1 through 4 in the MG 1000S. The card is not
supported in the MG 1000S Expansion.
Note: Clocking slips can occur between MG 1000S systems that are
clocked from different Central Offices (COs), if the COs are not
synchronized. The slips can degrade voice quality.
Physical description
The NTBK50 uses a standard 9.5" by 12.5" multi-layer printed circuit board.
The faceplate is 7/8” wide and contains seven LEDs. See Figure 166 on
page 775 .
IMPORTANT!
Each MG 1000S that has a digital trunk must have a clock controller
clocked to an external reference clock.